In the past extension springs were safer to install but didn t have containment cables running through the center of the spring.
How to replace a garage door track.
However it is somewhat labor intensive and will take some time.
Disconnect the track from the brackets that allow it to hang from the ceiling.
Remove the brackets holding the track in place.
Torsion see above which mounts on the header above the door and extension photo 1 which floats above the upper roller track.
Garage door springs come in two styles.
Find new rollers and hinges here.
Remove the old door tracks and the laser sensor that keeps the door from closing when an object is beneath it.
Keep a firm grip on the rail or it will fall image 1.
After removing the old door installing the new door is done by stacking the door panels one at a time and fitting the roller tracks around the panels wheels.
Also you will probably need someone to assist you because garage doors can be heavy.